Repaired my first malware infection without obvious clues as to the source

The last few times I’ve repaired a malware infestation, there have been some obvious clues to the infection source:  loads of “free” games, a couple suspicious browser toolbars, p2p file sharing software with a hefty repository of downloaded content, visits to questionable sites, etc…  This infection had none of the above. It manifested itself (probably […]